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Math Help - Find f(g(-3))

  1. #1
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    Find f(g(-3))

    When f(x)=x^2-1 and g(x)=x+2

    If someone could help me with first step I could probably do the rest.

    Thanks,
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  2. #2
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    Hi!

    Try sticking the expressions for g(x) into the place of the x in the expression of f(x).
     <br />
f(g(x))=(x+2)^2-1<br />
.

    Hope this helps... I'm not mathematician.
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  3. #3
    MHF Contributor harish21's Avatar
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    Quote Originally Posted by Tally View Post
    When f(x)=x^2-1 and g(x)=x+2

    If someone could help me with first step I could probably do the rest.

    Thanks,
    g(-3) = -3+2 = -1

    f(g(-3))= (-1)^{2} -1 = 1-1 = 0
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  4. #4
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    Quote Originally Posted by harish21 View Post
    g(-3) = -3+2 = -1

    f(g(-3))= (-1)^{2} -1 = 1-1 = 0
    Awesome Thank you. I understand it much clearer now.
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